Monolithic haptic touch screen, manufacturing method thereof, and display device including the same

ABSTRACT

A monolithic haptic-type touch screen capable of performing both touch recognition and haptic feedback are provided. The monolithic haptic-type touch screen includes an insulating film formed by doping ferroelectric material in an electroactive polymer (EAP), an upper electrode formed on an upper surface of the insulating film, and a lower electrode formed on a lower surface of the insulating film and corresponding to the upper electrode.

CROSS-REFERENCE TO RELATED APPLICATION

Pursuant to 35 U.S.C. § 119(a), this application claims the benefit ofearlier filing date and right of priority to Korean Patent ApplicationNo. 10-2013-0155777, filed on Dec. 13, 2013, the contents of which isincorporated by reference herein in its entirety.

BACKGROUND

1. Technical Field

The present disclosure relates to a touch screen and, more particularly,to a monolithic haptic-type touch screen integrating a touch functionand a haptic function, a manufacturing method thereof, and a displaydevice including the same.

2. Background

A touch screen is an input device for recognizing a particular positionwhen a user's hand or an object touches the particular position, andexecuting a particular function, without using an input device such as akeyboard or a mouse.

Touch screens are used in various display devices, for example,electronic products having various screen sizes, such as an automatedteller (ATM) machine of a bank, a personal digital assistant (PDA), aportable multimedia player (PMP), a touch pad of a notebook computer, anavigation device, and the like, as well as a cellular phone.

Recently, beyond providing mere touch and direct manipulationfunctionality, haptic functionality has been added to the touch screento provide touch sensation to users. Haptic technology is technologythat allows users to feel the sense of touch, a force, a motion, and thelike.

A haptic function is implemented together with a touch screen in adisplay device, and when a user touches a touch screen as an inputdevice, the haptic function may provide a tactile feedback to the userthrough vibrations, or the like.

FIG. 1 is a view illustrating a structure of a related art displaydevice including a touch screen and a haptic device.

Referring to FIG. 1, a related art display device 1 includes a coverglass 3, a touch screen 4, a display panel 2, and a haptic feedback unit5.

The display panel 2 is a part where an image is substantially displayed,and an organic light emitting panel, a plasma panel, and the like, isused as the display panel 2.

The touch screen is positioned above the display panel 2 and senses atouch input applied by a user through the cover glass 3.

The touch screen 4 includes an insulating film 4 b, and an upperelectrode 4 a and a lower electrode 4 c respectively formed above andbelow the insulating film 4 b.

When the user applies a touch input through the cover glass 3, the touchscreen 4 recognizes the touch input by capacitance generated between theupper electrode 4 a and the lower electrode 4 c, and performs acorresponding operation.

The cover glass 3 is positioned above the touch screen 4 to protect thetouch screen 4 and the display panel 2. The cover glass 3 is formed astempered glass having a predetermined thickness.

The haptic feedback unit 5 is positioned below the display panel 2 andprovides a haptic feedback such as vibrations or the like, to the user.

The haptic feedback unit 5 operates together with the touch screen 4,and thus, when the user touches the touch screen 4, the haptic feedbackunit 5 provides a haptic feedback to the user. The haptic feedback unit5 is configured as a vibration motor or formed of piezoelectric ceramic.

Here, since the related art display device 1 having the foregoingconfiguration is configured to include the touch screen 4 and the hapticfeedback unit 5, an overall thickness of the display device 1 increases.

Also, since the haptic feedback unit 5 is positioned in the lowermostportion, namely, below the display panel 2, haptics such as vibrationsgenerated by the haptic feedback unit 5 may not properly be delivered tothe user.

For example, in a case in which the haptic feedback unit 5 is configuredas a vibration motor, it may be difficult to promptly provide a hapticfeedback to the user due to a low response speed of the vibration motor,and in order to deliver uniform vibrations to the front surface of thedisplay device, a large number of vibration motors should be used, whichresults in an increase in the thickness and size of the display device1.

Also, in a case in which the haptic feedback unit 5 is formed ofpiezoelectric ceramic, a response speed may be enhanced, compared withthe vibration motor, but manufacturing cost of the display device 1increases due to high-priced piezoelectric ceramic. In addition, due toopaque characteristics of piezoelectric ceramic, the haptic feedbackunit 5 needs to be disposed in the lowermost portion of the displaypanel 2, like the vibration motor, and thus, it is challenging toaccurately deliver a haptic feedback to the user.

SUMMARY

Therefore, an aspect of the detailed description is to provide amonolithic haptic-type touch screen capable of performing both a touchrecognition and providing a haptic feedback, a manufacturing methodthereof, and a display device including the monolithic haptic-type touchscreen.

To achieve these and other advantages and in accordance with the purposeof this specification, as embodied and broadly described herein, amonolithic haptic-type touch screen may include: an insulating filmincluding doped ferroelectric material in an electroactive polymer(EAP); an upper electrode formed on an upper surface of the insulatingfilm; and a lower electrode formed on a lower surface of the insulatingfilm and corresponding to the upper electrode. The upper electrode andthe lower electrode operate as electrodes for both touch recognition andhaptic feedback.

To achieve these and other advantages and in accordance with the purposeof this specification, as embodied and broadly described herein, amethod for manufacturing a monolithic haptic-type touch screen mayinclude: immersing a ferroelectric material in a liquid polymer to forman insulating film; forming an upper electrode on an upper surface ofthe insulating film; and forming a lower electrode, which corresponds tothe upper electrode, on a lower surface of the insulating film.

According to one or more embodiments, a display device comprises adisplay panel configured to display an image and a haptictouch-sensitive structure. The haptic touch-sensitive structurecomprises a first electrode disposed proximal to a user-facing side ofthe display device, a second electrode disposed distal to theuser-facing side of the device, and an insulating film formed betweenthe first electrode and the second electrode. In some embodiments, thehaptic touch-sensitive structure is configured to generate a touchsignal responsive to a touch input from a user detected by the firstelectrode and the second electrode and the haptic touch-sensitivestructure is further configured to generate a haptic output responsiveto a vibration signal applied to the first electrode and the secondelectrode. In some embodiments, the haptic touch-sensitive structure isconfigured to generate the haptic output at a location of the touchinput, responsive to the vibration signal including the location of thetouch input applied to the first electrode and the second electrode.

According to embodiments of the present disclosure, the monolithichaptic-type touch screen, the manufacturing method thereof, and thedisplay device including the same, since the monolithic haptic-typetouch screen capable of performing both touch recognition and hapticfeedback is manufactured by using an electroactive polymer (EAP), anoverall thickness of a display device configured to execute a touch andhaptic function by including the monolithic haptic-type touch screen canbe reduced, and thus, manufacturing cost can be reduced.

Also, since the monolithic haptic-type touch screen is positioned abovea display panel, an accurate and prompt haptic feedback may be providedto a user.

In addition, since a haptic feedback is selectively provided limitedlyfor a user's touch point, rather than the entire region of the touchscreen, various haptic outputs can be provided to a user.

Further scope of applicability of the present application will becomemore apparent from the detailed description given hereinafter. However,it should be understood that the detailed description and specificexamples, while indicating preferred embodiments, are given by way ofillustration only, since various changes and modifications within thespirit and scope will become apparent to those skilled in the art fromthe detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding and are incorporated in and constitute a part of thisspecification, illustrate exemplary embodiments and together with thedescription serve to explain the principles.

In the drawings:

FIG. 1 is view illustrating a structure of the related art displaydevice including a touch screen and a haptic device.

FIG. 2 is a view illustrating a structure of a display device includinga monolithic haptic-type touch screen according to an embodiment of thepresent disclosure.

FIG. 3 is a flow chart illustrating a process of a method formanufacturing a monolithic haptic-type touch screen.

FIG. 4 is a view illustrating an electric structure of the monolithichaptic-type touch screen according to an embodiment of the presentdisclosure.

FIG. 5 is a view illustrating an electric structure of the monolithichaptic-type touch screen according to another embodiment of the presentdisclosure.

FIG. 6 is a view illustrating a driving unit of the display deviceincluding the monolithic haptic-type touch screen illustrated in FIG. 2.

FIG. 7 is a view illustrating a display device including a monolithichaptic-type touch screen.

DETAILED DESCRIPTION

Description will now be given in detail of the exemplary embodiments,with reference to the accompanying drawings. For the sake of briefdescription with reference to the drawings, the same or equivalentcomponents will be provided with the same reference numbers, anddescription thereof will not be repeated.

Hereinafter, a monolithic haptic-type touch screen, a manufacturingmethod thereof, and a display device including the same according toembodiments of the present disclosure will be described with referenceto the accompanying drawings.

FIG. 2 is a view illustrating a structure of a display device includinga monolithic haptic-type touch screen according to an embodiment of thepresent disclosure.

Referring to FIG. 2, a display device 100 according to the presentembodiment may include a protective cover 130, a monolithic haptic-typetouch screen 120, and a display panel 110.

The display panel 110 is a part where an image is substantiallydisplayed, and a liquid crystal panel, an organic light emitting panel,a plasma panel, and the like, may be used as the display panel 110, butthe present disclosure is not limited thereto. An image displayed on thedisplay panel 110 may be provided to a user through the monolithichaptic-type touch screen 120 and the protective cover 130.

The monolithic haptic-type touch screen 120 may be disposed on thedisplay panel 110. The monolithic haptic-type touch screen 120 mayinclude a transparent insulating film and transparent electrodes,namely, an upper electrode 125 and a lower electrode 123, respectivelydisposed on upper and lower surfaces of the insulating film 121.

The insulating film 121 may be formed by using an electroactive polymer(EAP) material.

The EAP material may have a structure in which an electrode, a polymer,and an electrode are vertically arranged in this order, and may generatevibrations according to a signal, for example, a voltage, applied fromthe outside.

For example, the insulating film 121 formed of an EAP material maycontinuously contract and expand according to a voltage applied theretoto stably generate vibrations, and since the insulating film 121 has ahigh response speed, it may generate vibrations having various frequencybands.

As the EAP, dielectric elastomer such as silicone, acryl, urethane, andthe like, may be used. The dielectric elastomer may have hightransparency and elasticity.

However, the foregoing dielectric elastomer requires a relatively highvoltage and is excessively deformed due to a low Young's modulusthereof, having low durability. Thus, the insulating film 121 accordingto the present embodiment may be formed by doping a material having ahigh Young's modulus and ferroelectricity characteristics in an EAP.

Since the insulating film 121 is formed by doping a material having ahigh Young's modulus and ferroelectricity in an EAP, the insulating film121 requires a low driving voltage and has enhanced durability, comparedwith the related art insulating film formed using an EAP, or the like.

Here, the insulating film 121 may be formed to have a thickness rangingfrom about 50 μm to 200 μm, and a voltage applied to the insulating film121 may be in inverse proportion to a thickness of the insulating film121.

Also, the insulating film 121 may have high transmittance equal to orgreater than 85%, Young's modulus ranging from about 300 to 700, andstrain of 5% or less.

The upper electrodes 125 and the lower electrode 123 may be positionedon upper and lower surfaces of the insulating film 121.

The upper electrode 125 and the lower electrode 123 may operate as anelectrode of a touch sensor sensing a touch input applied by the userand an electrode of a haptic actuator providing a haptic feedback to theuser.

For example, when the user performs a touch operation on an uppersurface of the protective cover 130, capacitance in the upper electrode125 and the lower electrode 123 with the insulating film 121 interposedtherebetween is changed in the portion touched by the user. The displaydevice 100 senses the change in capacitance to recognize the user'stouch.

Also, in order to provide a haptic feedback, for example, vibrations, tothe user, a predetermined voltage may be applied to the upper electrode125 and the lower electrode 123. Accordingly, the insulating film 121may generate vibrations by the voltage applied to the upper electrode125 and the lower electrode 123, and the generated vibrations may beprovided to the user through the protective cover 130.

In consideration of the fact that the monolithic haptic-type touchscreen 120 is disposed on the display panel 110, the upper electrode 125and the lower electrode 123 may be formed of a transparent material, forexample, indium tin oxide (ITO) or indium zinc oxide (IZO).

However, in consideration of the fact that the upper electrode 125 andthe lower electrode 123 operate as electrodes for a haptic feedback, theupper electrode 125 and the lower electrode 123 may be formed of atransparent electrode material resistant to vibrations, such as carbonnanotube (CNT), an organic conductive polymer (PEDOT/PSS), graphene, asilver nanowire, or metal mesh.

The protective cover 130 may be disposed on the monolithic haptic-typetouch screen 120. The protective cover 130 may protect the touch screen120 and the display panel 110.

Also, the protective cover 130 may operate as a medium deliveringvibrations generated in the monolithic haptic-type touch screen 120 tothe user. In other words, the protective cover 130 may amplifyvibrations generated in the monolithic haptic-type touch screen 120toward the user.

Meanwhile, the protective cover 130 may be formed of tempered glass, orthe like. However, in consideration of the fact that the monolithichaptic-type touch screen 120 provides localized vibrations to the user,the protective cover 130 may be formed of transparent plastic such aspolymethacrylate, polycarbonate, and the like.

Meanwhile, although not shown, an insulating sheet (not shown) formed ofan insulating material may be disposed between the monolithichaptic-type touch screen 120 and the display panel 110.

The insulating sheet may prevent malfunction of the display panel 110due to a high voltage generated when the monolithic haptic-type touchscreen 120 performs a touch and haptic operation. Also, according tocircumstances, a conductive sheet, instead of an insulating sheet, maybe disposed, and in this case, the conductive sheet may be connected toa ground GND.

Hereinafter, a method for manufacturing the monolithic haptic-type touchscreen according to an embodiment of the present disclosure will bedescribed in detail.

FIG. 3 is a flow chart illustrating a process of a method formanufacturing the monolithic haptic-type touch screen illustrated inFIG. 2.

Referring to FIGS. 2 and 3, the method for manufacturing a monolithichaptic-type touch screen according to the present embodiment may includean insulating film manufacturing step (S10), an upper electrode formingstep (S20), and a lower electrode forming step (S30).

Also, the insulating film manufacturing step (S10) may include sub-stepsof immersing (S11), dispersing (S13), and drying (S15).

First, a ferroelectric material may be immersed in a liquid EAP, namely,a liquid polymer matrix (S11).

The ferroelectric material may be a material having high permittivity,and a ceramic compound may be used as the ferroelectric material. Forexample, the ferroelectric material may be a ceramic compound having aperovskite structure such as barium titanate (BaTiO3), lead titanate(PbTiO3), lead zirconate (PbZrO3), or niobium potassium oxide (KNbO3)having high permittivity characteristics.

The ferroelectric material may be immersed in an amount of about 1.0 wt% to 4.5 wt % in a liquid polymer. If the ferroelectric material isimmersed by less than 1.0 wt %, it may be difficult to obtain an effectof requiring a low driving voltage due to high permittivity, and if theferroelectric material is immersed in excess of 4.0 wt %, transmissivitymay be reduced.

Also, the ferroelectric material may be immersed in the form of powderin a liquid polymer. In this case, particles of the ferroelectricmaterial may have a size ranging from 50 to 150 nm. If a size of theparticle of ferroelectric powder is less than 50 nm, considerableparticle aggregation occurs, and thus, ferroelectric powder is notproperly mixed with the liquid polymer, and if a size of the particle offerroelectric powder exceeds 150 nm, transmissivity is reduced due toopaqueness of particle.

Subsequently, the immersed ferroelectric material may be dispersed in aliquid polymer (S13). For example, the after the ferroelectric materialis immersed, the ferroelectric material may be dispersed in the polymermatrix by using a high-speed rotary machine or an extractor.

Subsequently, liquid polymer in which the ferroelectric material isdispersed may be left at room temperature for a predetermined time anddried to form the insulating film 121 (S15).

Here, the liquid polymer may be left for about two to four hours at roomtemperature. Also, the liquid polymer may be dried for more than fourhours at a temperature ranging from 100° C. to 200° C. to form theinsulating film 121.

After the insulating film 121 is formed, the upper electrode 125 may beformed on an upper surface of the insulating film 121 (S20). Also, thelower electrode 123 is formed on a lower surface of the insulating film121, thus manufacturing the monolithic haptic-type touch screen 120(S30).

Meanwhile, the upper electrode 125 and the lower electrode 123 may beformed in various shapes on the upper and lower surfaces of theinsulating film 121, respectively.

For example, the upper electrode 125 and the lower electrode 123 may beformed in a flat shape, a bar shape, or a checkerboard shape including aplurality of sub-electrodes on the upper and lower surfaces of theinsulating film 121, respectively.

FIG. 4 is a view illustrating an electric structure of the monolithichaptic-type touch screen according to an embodiment of the presentdisclosure, and FIG. 5 is a view illustrating an electric structure ofthe monolithic haptic-type touch screen according to another embodimentof the present disclosure.

Referring to FIG. 4, a plurality of upper electrode 125 may be arrangedin one direction on the upper surface of the insulating film 121, havinga bar shape.

Also, a plurality of lower electrodes 123 may be arranged in the otherdirection on the lower surface of the insulating film 121 such that thelower electrodes 123 correspond to the upper electrodes 125. Here, theupper electrodes 125 and the lower electrodes 123 may cross each otherin the arrangement directions.

As capacitance is changed in an intersection of the upper electrode 125and the lower electrode 123 according to a user's touch, the user'stouch input may be recognized.

The upper electrode 125 and the lower electrode 123 may be provided witha predetermined voltage from the outside such that the insulating film121 vibrates at the recognition point.

The upper electrode 125 and the lower electrode 123 may be formed bydepositing an electrode material on the upper and lower surfaces andpatterning the same, respectively.

Meanwhile, in order to more precisely recognize a touch and provide ahaptic feedback, the upper electrode 125 and the lower electrode 123 mayhave a checkerboard structure including a plurality of sub-electrodes.

Referring to FIG. 5, the upper electrode 125 may have a checkerboardshape including a plurality of sub-electrodes on the upper surface ofthe insulating film 121. Here, the plurality of sub-electrodes of theupper electrode 125 may be individually connected to an externalcircuit, for example, a touch and haptic control circuit.

The lower electrode 123 may be formed to have a flat shape on the lowersurface of the insulating film 121. However, the present disclosure isnot limited thereto and the lower electrode 123 may also have acheckerboard shape identical to that of the upper electrode 125.

The upper electrode 125 and the lower electrode 123 as described abovemay cause capacitance to be changed in an intersection thereof by auser's touch, whereby the user's touch input can be recognized.

The upper electrode 125 and the lower electrode 123 may be provided witha predetermined voltage such that the insulating film 121 vibrates atthe recognition point.

In this case, since the upper electrode 125 includes a plurality ofsub-electrodes, the user's touch input may be more accurately recognizedand a corresponding haptic feedback may be provided, relative to theupper electrode 125 described above with reference to FIG. 4.

The upper electrode 125 and the lower electrode 123 may be formed bydepositing an electrode material on upper and lower surfaces of theinsulating film 121 and pattering the same, respectively.

FIG. 6 is a view illustrating a driving unit of the display deviceincluding the monolithic haptic-type touch screen illustrated in FIG. 2.

Referring to FIGS. 2 and 6, a driving unit 200 of the display device 100may include a touch control unit 210, a haptic control unit 220, and amain control unit 230.

Here, the touch control unit 210 may include a touch input unit 211 anda touch controller 213. Also, the haptic control unit 220 may include ahaptic controller 221, an amplifier 223, and a haptic operating unit225.

The touch control unit 210 may sense a touch input of the user andcontrol the display panel 110 of the display device 100 to perform acorresponding operation.

In some embodiments, the touch input unit 211 may sense a user's touchinput, and the touch controller 213 may generate touch coordinates ofthe user and a corresponding command according to the sensing result.

For example, the user may touch a predetermined icon on a screen visiblethrough the protective cover 130 of the display device 100, namely, on ascreen displayed on the display panel 110.

The touch input unit 211 may sense the user's touch input through achange in capacitance of the monolithic haptic-type touch screen 120.The touch input unit 211 may output the sensing result to the touchcontroller 213.

The touch controller 213 may generate touch coordinates of the user,namely, a position of the icon on the screen of the display panel 110and a command signal to be performed by the icon according to thesensing results output from the touch input unit 211. The touchcontroller 213 may output the touch coordinates and the command, as atouch signal, to the main control unit 230.

According to the touch signal output from the touch controller 213, themain control unit 230 may process the corresponding command and controlthe display unit 110 to display the processing result to allow the userto recognize it.

At the same time, in order to provide a haptic feedback, the maincontrol unit 230 may generate a predetermined haptic signal and outputthe generated haptic signal to the haptic control unit 220. The hapticsignal may include the touch coordinates of the user included in thetouch signal which has been provided from the touch control unit 210.

The haptic control unit 220 may generate a signal, namely, a vibrationsignal, for providing a haptic feedback for the user. The vibrationsignal may include the touch coordinates of the user and a predeterminedvoltage, for example, a voltage for using the monolithic haptic-typetouch screen 120 as a haptic actuator.

The voltage signal of the vibration signal output from the hapticcontrol unit 220 may be amplified by the amplifier 223. This is because,a high voltage, for example, a voltage ranging from 500 to 700V, needsto be applied to the upper electrode 125 and the lower electrode 123 ofthe monolithic haptic-type touch screen 120 for the haptic feedbackoperation.

Subsequently, the voltage signal amplified by the amplifier 223according to the touch coordinates of the vibration signal may be outputto the upper electrode 125 and the lower electrode 123 of the monolithichaptic-type touch screen 120.

Accordingly, vibrations are generated in a portion of the insulatingfilm 121 of the monolithic haptic-type touch screen 120 corresponding tothe upper electrode 125 and the lower electrode 123 to which the voltagesignal has been applied, and the vibrations may be provided as a hapticfeedback for the user through the protective cover 130.

Here, the haptic feedback operation of the monolithic haptic-type touchscreen 120 may be performed immediately when the touch sensing operationis finished, namely, almost simultaneously with the touch sensingoperation.

The monolithic haptic-type touch screen 120 may vibrate with strengthranging from about 0.5 to 1.0G, and a frequency when the monolithichaptic-type touch screen 120 vibrations may range from about 10 to 400Hz.

Meanwhile, when the upper electrode 125 of the monolithic haptic-typetouch screen 120 has a checkerboard structure including a plurality ofsub-electrodes as illustrated in FIG. 5, a touch input may be moreprecisely sensed and a more accurate haptic feedback may be provided.

For example, when the upper electrode 125 includes a plurality ofindividually operating sub-electrodes, the touch control unit 210 maymore precisely sense touch coordinates of the user by the plurality ofsub-electrodes. The haptic control unit 220 may allow the insulatingfilm to vibrate at the touch coordinates sensed by the touch controlunit 210, providing selective vibrations for the user.

FIG. 7 is a view illustrating a display device including a monolithichaptic-type touch screen.

As illustrated in FIG. 7, since the display device according to thepresent disclosure includes a monolithic haptic-type touch screen, thedisplay device has a small thickness. Also, since the display deviceaccording to the present disclosure does not use a haptic device such asa vibration motor, or the like, the display device according to thepresent disclosure is light in weight and has high transparency.

Thus, the display device including a monolithic haptic-type touch screenaccording to the present disclosure may be used as a display of aportable device such as a smartphone, a PDA, a navigation device, atablet, or the like.

As described above, the monolithic haptic-type touch screen may operateas a touch sensor when the user applies a touch input, and may be usedas a haptic actuator when it provides a haptic feedback, namely,vibrations, for the user.

Also, since the monolithic haptic-type touch screen has hightransparency, it may be disposed above the display panel, thus providinga prompt and accurate haptic feedback for the user.

In addition, the monolithic haptic-type touch screen may providevibrations for the user through the entire region thereof or mayselectively provide vibrations only in a user's touch portion.

The foregoing embodiments and advantages are merely exemplary and arenot to be considered as limiting the present disclosure. The presentteachings can be readily applied to other types of apparatuses. Thisdescription is intended to be illustrative, and not to limit the scopeof the claims. Many alternatives, modifications, and variations will beapparent to those skilled in the art. The features, structures, methods,and other characteristics of the exemplary embodiments described hereinmay be combined in various ways to obtain additional and/or alternativeexemplary embodiments.

As the present features may be embodied in several forms withoutdeparting from the characteristics thereof, it should also be understoodthat the above-described embodiments are not limited by any of thedetails of the foregoing description, unless otherwise specified, butrather should be considered broadly within its scope as defined in theappended claims, and therefore all changes and modifications that fallwithin the metes and bounds of the claims, or equivalents of such metesand bounds are therefore intended to be embraced by the appended claims.

What is claimed is:
 1. A monolithic haptic-type touch screen comprising:an insulating film including doped ferroelectric material in anelectroactive polymer (EAP); an upper electrode disposed on an uppersurface of the insulating film; and a lower electrode disposed on alower surface of the insulating film and corresponding to the upperelectrode, wherein the upper electrode and the lower electrode,responsive to a touch input on the monolithic haptic-type touch screen,generates a signal indicative of a location of the touch input on themonolithic haptic-type touch screen based on a change in capacitancebetween the lower electrode, the insulating film, and the upperelectrode before and after the touch input, and wherein the upperelectrode and the lower electrode, responsive to receiving a vibrationsignal, generates a haptic output of vibrations by causing theinsulating film to repeatedly contract and expand responsive to thevibration signal.
 2. The monolithic haptic-type touch screen of claim 1,wherein the EAP is one selected from a group consisting of dielectricelastomers of silicon, acryl, and urethane.
 3. The monolithichaptic-type touch screen of claim 1, wherein the ferroelectric materialis one selected from a ceramic compound group consisting of bariumtitanate, lead titanate, lead zirconate, and niobium potassium oxide. 4.The monolithic haptic-type touch screen of claim 1, wherein a thicknessof the insulating film ranges from 50 μm to 200 μm.
 5. The monolithichaptic-type touch screen of claim 1, wherein the upper electrode and thelower electrode include one selected from a group consisting of carbonnanotube (CNT), an organic conductive polymer, graphene, silvernanowire, and metal mesh.
 6. The monolithic haptic-type touch screen ofclaim 1, wherein the vibration signal comprises a voltage signal.
 7. Themonolithic haptic-type touch screen of claim 6, wherein the hapticoutput of vibrations is generated after a touch sensing operation. 8.The monolithic haptic-type touch screen of claim 1, wherein the signalindicative of the location of the touch input is provided to a touchcontroller.
 9. A display device comprising: a display panel configuredto display an image; a monolithic haptic-type touch screen disposed onthe display panel and configured to recognize a user's touch and providea haptic feedback to the user, the monolithic haptic-type touch screenincluding: an insulating film composed of doped ferroelectric materialin an electroactive polymer (EAP), an upper electrode disposed on anupper surface of the insulating film, and a lower electrode disposed ona lower surface of the insulating film and corresponding to the upperelectrode, wherein the upper electrode and the lower electrode,responsive to the user's touch, generates a signal indicative of alocation of the user's touch based on a change in capacitance betweenthe lower electrode, the insulating film, and the upper electrode beforeand after the user's touch, and wherein the upper electrode and thelower electrode, responsive to receiving a vibration signal, generates ahaptic output of vibrations by causing the insulating film to repeatedlycontract and expand responsive to the vibration signal; and a protectivecover disposed on the monolithic haptic-type touch screen.
 10. Thedisplay device of claim 9, wherein the protective cover includestransparent plastic of polymethacrylate or polycarbonate.
 11. Thedisplay device of claim 9, further comprising: an insulating sheetdisposed between the monolithic haptic-type touch screen and the displaypanel.
 12. The display device of claim 9, wherein the vibration signalcomprises a voltage signal.
 13. The display device of claim 12, whereinthe haptic output of vibrations is generated after a touch sensingoperation.
 14. The display device of claim 9, wherein the signalindicative of the location of the touch input is provided to a touchcontroller.
 15. A display device comprising: a display panel configuredto display an image; and a haptic touch-sensitive structure including: afirst electrode disposed proximal to a user-facing side of the displaydevice; a second electrode disposed distal to the user-facing side ofthe device; and an insulating film formed between the first electrodeand the second electrode, wherein the haptic touch-sensitive structure,responsive to a touch input on a monolithic haptic-type touch screen, isconfigured to generate a touch signal indicative of a location of thetouch input on the monolithic haptic-type touch screen based on a changein capacitance between the first electrode, the insulating film, and thesecond electrode before and after the touch input, and wherein thehaptic touch-sensitive structure, responsive to applying a vibrationsignal to the first electrode and the second electrode, is furtherconfigured to generate a haptic output of vibrations by causing theinsulating film to repeatedly contract and expand responsive to thevibration signal.
 16. The display device of claim 15, wherein the haptictouch-sensitive structure is configured to generate the haptic output atthe location of the touch input, responsive to the vibration signalincluding the location of the touch input applied to the first electrodeand the second electrode.
 17. The display device of claim 15, whereinthe insulating film includes doped ferroelectric material in anelectroactive polymer (EAP), and the vibration signal is a voltagesignal applied to both the first electrode and the second electrode togenerate the haptic output.
 18. The display device of claim 17, whereinthe insulating film is substantially transparent to visible light. 19.The display device of claim 17, wherein the EAP is one selected from agroup consisting of dielectric elastomers of silicon, acryl, andurethane.
 20. The display device of claim 17, wherein the ferroelectricmaterial is one selected from a ceramic compound group consisting ofbarium titanate, lead titanate, lead zirconate, and niobium potassiumoxide.
 21. The display device of claim 17, wherein a thickness of theinsulating film ranges from 50 μm to 200 μm.
 22. The display device ofclaim 17, wherein the first electrode and the second electrode includeone selected from a group consisting of carbon nanotube (CNT), anorganic conductive polymer, graphene, silver nanowire, and metal mesh.23. The display device of claim 15, wherein the vibration signalcomprises a voltage signal.
 24. The display device of claim 23, whereinthe haptic output of vibrations is generated after a touch sensingoperation.
 25. The display device of claim 15, wherein the touch signalis generated by a touch controller.